https://github.com/bbc/bmx/pull/32 reminded that there are differences in VideoLineMap and the line numbers for 525-line were changed / fixed to be {20,283}. Check the bmx codebase to see if there are more inconsistencies that are not a result of a explicit choice by a manufacturer. E.g. VC2 has it set to {23, 285}, but there is a comment above saying it needs checking!
https://github.com/bbc/bmx/pull/32 reminded that there are differences in VideoLineMap and the line numbers for 525-line were changed / fixed to be
{20,283}. Check the bmx codebase to see if there are more inconsistencies that are not a result of a explicit choice by a manufacturer. E.g. VC2 has it set to{23, 285}, but there is a comment above saying it needs checking!